Re: Linux/PostgreSQL scalability issue - problem with 8 cores

From: Jakub Ouhrabka <kuba(at)comgate(dot)cz>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Linux/PostgreSQL scalability issue - problem with 8 cores
Date: 2008-01-15 15:45:57
Message-ID: 478CD535.6030004@comgate.cz
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> Huh. One transaction truncating a dozen tables? That would match the
> sinval trace all right ...

It should be 4 tables - the shown log looks like there were more truncates?

> You might be throwing the baby out with the bathwater,
> performance-wise.

Yes, performance was the initial reason to use truncate instead of
delete many years ago. But today the truncated tables usualy contain
exactly one row - quick measurements now show that it's faster to issue
delete instead of truncate in this case.

Again, many thanks for your invaluable advice!

Kuba

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